CN210658642U - Wedge-shaped flow guide pier for coping with large diffusion angle of pump station forebay - Google Patents
Wedge-shaped flow guide pier for coping with large diffusion angle of pump station forebay Download PDFInfo
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- CN210658642U CN210658642U CN201920919627.5U CN201920919627U CN210658642U CN 210658642 U CN210658642 U CN 210658642U CN 201920919627 U CN201920919627 U CN 201920919627U CN 210658642 U CN210658642 U CN 210658642U
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Abstract
The utility model belongs to the technical field of hydraulic engineering, specifically a reply wedge water conservancy diversion mound of big spread angle of pump station forebay. The wedge-shaped diversion pier is of a triangular prism structure with the top surface arranged obliquely and is arranged in the forward water inlet forebay; arranging a flow guide pier at a position 4D (D is the diameter of an impeller) away from the front pool inlet, wherein the top surface of the wedge-shaped flow guide pier is an isosceles triangle, the vertex angle of the isosceles triangle is lower than the bottom edge of the isosceles triangle, the vertex angle of the isosceles triangle faces the front pool inlet, and the bottom edge faces the water inlet pool; can effectively avoid bad flow states such as backflow, vortex and the like. The utility model discloses the innovation part lies in being the wedge with the water conservancy diversion mop arrangement, and the water conservancy diversion is effectual, advantages such as material saving. Increase the utility model discloses a wedge water conservancy diversion mound can effectively solve the forebay mainstream and concentrate, rivers distribute the inequality, flow state disorder scheduling problem.
Description
Technical Field
The utility model belongs to the technical field of hydraulic engineering, specifically a reply wedge water conservancy diversion mound of big spread angle of pump station forebay.
Background
The forebay is used as a hydraulic building for connecting the water inlet bay and the approach channel, and mainly plays a role of smoothly diffusing water flow, wherein the size of the diffusion angle of the forebay directly influences the flow state of the water flow in the forebay. The unreasonable arrangement of the diffusion angle is easy to generate adverse flow states such as backflow, vortex and the like. According to the specification, the value of the front pool spread angle should be within. In the projects such as the urban drainage pump station and the like, due to the reasons of site arrangement and the structural characteristics of the projects, the compressed pipe water inflow causes the concentration of mainstream, the diffusion angle is too large to be avoided, the wall separation backflow can be caused, the mainstream is further pressed, and the problem of uneven flow distribution and the like is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the not enough of above-mentioned prior art, provide a reply pump station forebay large spread angle's wedge water conservancy diversion mound. The purpose is to improve the forward water flow state of the front pool of the municipal drainage pump station, and a wedge-shaped flow guide pier is added in the forward water inlet front pool of the municipal drainage pump station, so that the generation of wall-separating backflow is inhibited, the inlet condition of a water pump is improved, and the efficiency of a water inlet flow channel is improved.
The purpose of the utility model is realized like this:
the wedge-shaped flow guide pier for dealing with the large diffusion angle of the pump station forebay is characterized in that the wedge-shaped flow guide pier is of a triangular prism structure with the top surface obliquely arranged and is arranged in the forward water inlet forebay.
Preferably, the wedge-shaped diversion pier is arranged at a position 4D away from the forebay inlet, wherein D is the diameter of the water pump impeller.
Preferably, the top surface of the wedge-shaped flow guiding pier is an isosceles triangle, the vertex angle of the isosceles triangle is lower than the bottom edge of the isosceles triangle, the vertex angle of the isosceles triangle faces the inlet of the forebay, and the bottom edge of the isosceles triangle faces the inlet sump.
Preferably, the apex angle of the isosceles triangle is 90 °, the waist length is 2.5D, and D is the water pump impeller diameter.
Preferably, the height of the vertex corresponding to the vertex angle of the isosceles triangle is 0.3 times of the depth of the cross section of the intake pool, and the height ratio of the height to the bottom side is 1: 1.38.
preferably, the base of the isosceles triangle is perpendicular to the water flow direction.
the utility model discloses there is the problem of bad flow state such as the macroscale whirlpool to big diffusion angle forebay, add wedge water conservancy diversion mound at the forebay slope section, when no rectification measure, mainstream is too concentrated in the forebay, there is the symmetry facade vortex to appear, seriously influence forebay diffusion rivers, rivers wrap up and hold the vortex even, further influence flow state in the intake pond, from forebay import 4D department, it is 90, length is behind the water conservancy diversion mound for 2.5D to add water conservancy diversion angle beta, can obviously improve the forebay flow state, rivers evenly get into each intake pool, the research achievement is too concentrated or big diffusion pump station angle forebay flow state improvement to municipal drainage pump station mainstream has reference meaning, the utility model discloses be favorable to improving the rivers flow state of municipal drainage pump station forebay better, improve water pump import condition, the technology is reliable, easy to carry out.
The utility model relates to a reply wedge water conservancy diversion mound of big spread angle of municipal drainage pump station forebay arranges in forebay slope section, and apart from forebay import 4D department (D is the impeller diameter), set up the water conservancy diversion mound for sill and stand, can avoid backward flow, bad flow states such as swirl effectively. The utility model discloses the innovation part lies in arranging the water conservancy diversion mound for the wedge, and for traditional T shape water conservancy diversion mound, Y shape water conservancy diversion mound has the construction simply, and the water conservancy diversion is effectual, advantages such as material saving.
Drawings
FIG. 1 is a schematic structural view of a wedge-shaped diversion pier of the present invention;
FIG. 2 is a three-dimensional model of the present invention;
FIG. 3 is a plane size of a water inlet part of the forebay of the present invention;
FIG. 4 is a three-dimensional streamline projection diagram of an original scheme forebay;
FIG. 5 is a three-dimensional streamline projection diagram of the forebay after the diversion pier of the utility model is adopted;
in the figure: 1 the top surface of the wedge-shaped diversion pier and 2 the bottom surface of the wedge-shaped diversion pier.
Detailed Description
The utility model is suitable for a pond formula engineering before various big diffusion angle positive intakes designs the drawing according to this designing requirement. And determining the total length of the wedge-shaped diversion pier in the front pool along the water flow direction L (namely the waist length of the top surface of the wedge-shaped diversion pier), the diversion included angle of the diversion pier (namely the vertex angle of the top surface of the wedge-shaped diversion pier) and the height of the diversion pier.
The height of the wedge-shaped flow pier and the top point of the flow pier are shown in figure 1AThe height of the point is 0.3 times the depth of the cross-sectional water. The height ratio of the top point A of the diversion pier to the top points B and C is 1: 1.38.
the length L of the wedge-shaped diversion pier along the water flow direction is 2.5D, namely the waist length. And (D is the diameter of the water pump impeller), the wedge-shaped diversion pier is arranged at a position 4D away from the front pool inlet (namely the distance between the top A of the diversion pier and the front pool inlet is 4D), and the distances between the diversion pier and the left and right side walls are equal. The bottom side BC is perpendicular to the water flow direction. The flow guide included angle of the wedge-shaped flow guide pier is 90 degrees.
The horizontal projection of the top surface of the wedge-shaped flow guide pier is triangular, the head part of the flow guide pier is triangular, and the cross section of the tail part of the flow guide pier is designed to be rectangular.
The utility model discloses add in pump station forward intake forebay suitable position and establish wedge water conservancy diversion mound, the rivers that the guide that wedge water conservancy diversion mound can be fine flows via leading the river, has played very good water conservancy diversion effect, improves near intake pool pump station water inflow runner's rivers flow state and the import cross section velocity of flow degree of consistency effectively.
The utility model is used for the improvement of water conservancy diversion mound in the municipal drainage pump station forebay will change into the wedge along water flow direction water conservancy diversion mound head. Before the water flow enters the water inlet channel through the diversion pier, the flowing water flow is guided by the wedge-shaped section of the diversion pier, the flow state of the water flow is improved, and the flow velocity distribution is uniform. The utility model is suitable for a various forward forebay projects of intaking can effectively improve near the big diffusion angle forward flow state of intaking in forebay, eliminates the vortex, makes rivers more smooth-going, improves the velocity of flow degree of consistency of water pump water inlet channel import.
The water conservancy diversion mound is a rectification measure commonly used and is used for improving the forebay flow state, the utility model discloses be favorable to improving the rivers flow state near big diffusion angle forward inflow forebay better, improve water pump inlet condition, the technique is reliable, easy to carry out, and application prospect is wide.
Claims (2)
1. A wedge-shaped flow guide pier for dealing with a large diffusion angle of a pump station forebay is characterized in that the wedge-shaped flow guide pier is of a triangular prism structure with the top surface arranged in an inclined mode and is arranged in a forward water inlet forebay; the wedge-shaped diversion pier is arranged at a position 4D away from the inlet of the forebay, and D is the diameter of the water pump impeller; the top surface of the wedge-shaped flow guide pier is an isosceles triangle, the vertex angle of the isosceles triangle is lower than the bottom edge of the isosceles triangle, the vertex angle of the isosceles triangle faces the inlet of the forebay, and the bottom edge faces the inlet sump; the vertex angle of the isosceles triangle is 90 degrees, the waist length is 2.5D, and D is the diameter of the water pump impeller; the vertex corresponding to the vertex angle of the isosceles triangle is 0.3 times of the water depth of the cross section of the water inlet pool, and the height ratio of the height to the bottom edge is 1: 1.38.
2. the wedge-shaped flow guide pier for dealing with the large diffusion angle of the pump station forebay according to claim 1, wherein the bottom side of the isosceles triangle is perpendicular to the water flow direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920919627.5U CN210658642U (en) | 2019-06-19 | 2019-06-19 | Wedge-shaped flow guide pier for coping with large diffusion angle of pump station forebay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920919627.5U CN210658642U (en) | 2019-06-19 | 2019-06-19 | Wedge-shaped flow guide pier for coping with large diffusion angle of pump station forebay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210658642U true CN210658642U (en) | 2020-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920919627.5U Active CN210658642U (en) | 2019-06-19 | 2019-06-19 | Wedge-shaped flow guide pier for coping with large diffusion angle of pump station forebay |
Country Status (1)
| Country | Link |
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| CN (1) | CN210658642U (en) |
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2019
- 2019-06-19 CN CN201920919627.5U patent/CN210658642U/en active Active
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